CVE-2019-25311: thesystem version 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject

Routine

MEDIUM 6.4DOWNGRADE

CVE-2019-25311 is a medium-severity flaw (CVSS 6.4) affecting thesystem. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

thesystem version 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts through multiple server data input fields. Attackers can submit crafted script payloads in operating_system, system_owner, system_username, system_password, system_description, and server_name parameters to execute arbitrary JavaScript in victim browsers.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-11
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: kostasmitroglou

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-11 15:16 UTCPublished CVE record published
2026-06-17 02:32 UTCUpdated Record last modified

kostasmitroglou thesystem DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy thesystem || rpm -q thesystem || thesystem --version

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison thesystem sudo apt install thesystem=<VERSION_BEFORE_1.0.0> sudo apt-mark hold thesystem

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list thesystem sudo dnf downgrade thesystem-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add thesystem

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-25311?

thesystem: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-25311 being exploited?

CVE-2019-25311 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-25311 affect?

CVE-2019-25311 affects thesystem. Severity is medium (CVSS 6.4). thesystem version 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts through multiple server data input fields. Attackers can submit crafted script payloads in operating_system, sy

How urgent is CVE-2019-25311?

Priority 31/100. Public exploit reference

Related CVEs

CVE-2019-25441 CRITICAL 9.8 DOWNGRADE thesystem 1.0 contains a command injection vulnerability that allows unauthenticated attackers to execute arbi

References

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